What should you avoid with shampoo?
Removing shampoo from your routine means your hair won't be exposed to these harsh chemicals. Rather, it'll retain more of its natural oils and result in more volume, Engelman says.
What not using shampoo does?
Sulfates: they increase skin sensitivity and strip hair of their natural oils, causing dryness. Parabens: they increase the risk of skin cancer. Phthalates: they are dangerous to the environment and cause hormonal disruptions. Formaldehyde: is carcinogenic and easily absorbed by the skin.